Riverwalk (place)

It is much more than that. The San Antonio River is below street level as it wanders through the downtown area. Yes, it is the major tourist attraction in the city, but it was originally conceived as a flood-control project in the 1920s, and was built with a lot of WPA manpower. The banks are lined with restaurants, and one river-branch terminates in a mall. You can ride on the river on electric-powered tourist boats, and the park rangers have their own boats.